New Fix solution to Repairing iPhone 7 Not Display Issue

When The iPhone 7 does not display, we need to diagnose the problem before repair. First connecting with adjustable power supply to test,  the current is about 350mA when booting. In most of cases, these problems are from broken NAND system or it wasn't tested when loading with other peripherals. Also the iPhone device was fallen off before, according to the symptom, we can judge that the NAND is false welding or system problems. After roughly judging the problem, it's time to start the iPhone 7 maintenance.

1. Connect computer to flash:

when it's ready to enter the normal mode, error 4013 is reported, then the phone into recovery mode. It doesn't seem like a system problem, so we remove the NAND. There is no problem to test the NAND to the CPU resistance, and the iPhone NAND is read normally on the test fixture. As shown in picture 7-14-1, the NAND is welded back.



2. According to the result of above test:

we can get to know there is no problem with the NAND. It seems something wrong with the baseband. CPU self check will also be some errors reported. From the picture 7-14-2, the baseband chip is removed.



3. After removing the iPhone 7 baseband:

No solder drop points were found. As shown in picture 7-14-3, welding the baseband back.


4. Reboot it again:

 The current is normal and the screen display is as shown in picture 7-14-4.



5. iPhone 7 maintenance is done here!

From the above iPhone repair process, we can conclude as that: the device doesn't diplay and reports error are both caused by the empty welding of the base band after dropping.


Tips:  More details on mobile phone screen details and mobile phone repair skills, please refer to Here!




Comments

Post a Comment

Popular posts from this blog

2021 Latest MagicAWRT Adapter Restore Tool for Apple Watch

Image
 Here we have the latest MagicAWRT adapter Apple Watch restore tool in 2021, and MagicAWRT offers its complete solutions to fix many apple watch problems. MagicAWRT Adapter is intended for solving service problems with Apple Watch S0/SE/S1/S2/S3/S4/S5/S6 (38 mm / 42 mm / 40 mm / 44 mm). It can solve problems such as white apples, exclamation points, restarts, stuck on screens, poor touch, ID lock, etc. It also can fix related issues that are caused by  Apple Watch glass digitizer touch replacement. Apple Watch Firmware for MagicAWRT Adapter Restore Tool will not be provided, and the customer needs to download themselves. 1. Using MagicAWRT Adapter to reset Apple Watch Data with or without Backup MagicAWRT Recovery Adapter Restore Tool is the best iOS data restore software in the market because of its ease of use and attractive user interface. Most Apple Watch users data losses are due to accidents, failed jailbreaks, hardware and software failures, factory resets, and theft. It would
Read more

My iPhone Got Wet! How To Fix iPhone Water Damage?

Image
 Water damage tends to worsen with time, and it is among the more challenging DIY repairs to undertake, so this guide covers the basic iPhone repair of water damage.  1. Remove iPhone from the water and Turn it off Remove your iPhone from the water as soon as safely possible. Minimize the length of time the iPhone and water are in contact to minimize corrosion. If your phone is still on when removed from the water, attempt to turn it off. If it's off, do not attempt to turn it on. 2. Check External Ports Check any external ports (charging port, headphone jack, SIM card slot, etc.) for corrosion as well. These may have to be cleaned out with alcohol and a  Anti Static Brush , or replaced if cleaning is not practical. Pay special attention to cable ends, battery contacts, connectors, pins, and fuses, as these parts are prone to corrosion and can easily cause the phone to malfunction. Test all the buttons and features (such as the microphone, s
Read more

Free download: Ford / Mazda odometer correction tool software

Image
New Mazda OBD2 Tool is the Digital Odometers, Airbag reset and immobilizer programming cables by OBD2, it is a newly OBD2 device for Mazda Vehicle. Mazda OBD2 Tool is Mazda OBD2 Odometer correct and Airbag module repair tool, especially for Mazda vehicle from 2005-2015.It is OBD2 user friendly tool, used for calibrate odometer and airbag repair. For Mazda Digital Odometers programming and Airbag reseting Tool by OBD2 Mazda OBD Tool is used to calibrate the instrument for all CAN-bus Mazda cars from 2005 to 2015 including MADZA 3/ MADZA 6 / MADZA CX5 / MADZA CX7, as well as reset the airbag/SRS for Mazda with XC236X chip. 2017 New Ford / Mazda OBD2 Tool is the Car Digital Odometers and immobilizer programming cables, and Ford OBD2 Tool and Mazda OBD2 Tool is used to mainly perform Ford / Mazda Digital Odometers, instrument calibration and immobilizer key matching. Here, VIP Pro Shop Team will share the software download link for Ford OBD2 Tool and Mazda OBD2 Tool.
Read more